An audit is performed on last year's 15,000 student-aid packages given out by the financial aid office at a state university. Roughly half of the student-aid packages were less than $500 (Category 1),...

Extracted text: An audit is performed on last year's 15,000 student-aid packages given out by the financial aid office at a state university. Roughly half of the student-aid packages were less than $500 (Category 1), about one-fourth were between $500 and $2000 (Category 2), and another quarter were over $2000 (Category 3). For each audit described in parts (a) through (d) below, name the sampling method that best describes it, (a) The auditor reviews all 15,000 student-aid packages. Choose the correct answer below. O Convenience sampling O Quota sampling O Simple random sampling Census Stratified sampling